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...y|resistivity]] of the log with deepest investigation (deep induction log [ILD], deep laterolog [LLD], etc.).

...'_o) from deep-reading resistivity tools such as deep induction (ILd) or deep laterolog (LLd) and porosity log(s). ...ined as follows. The data that are required include ''R''_t from ILd or LLd, ''R''_xo from SFL or another shallow-reading resistivity

| Shallow Resistivity (LLS and ILD) || Lithology interpretation, finding hydrocarbon bearing zone, calculate w | Deep Resistivity (LLD and ILD) || Lithology interpretation, finding hydrocarbon bearing zone, calculate w

...t is assumed here to be equal to the deep induction resistivity (''R''_ILd) due to the high porosity and relatively shallow mvasion. In zone ''A